Styrene-Butadiene Latex (SB Latex, Paper Coating Grade)
CAS Number: 9003-55-8
Styrene-butadiene (SB) latex is the primary binder in paper and board coating formulations, providing adhesion between pigment particles and fiber, as well as cohesion within the coating layer. It imparts excellent printability, gloss, and surface strength to coated papers. SB latex is used in combination with co-binders such as starch or CMC, and is the dominant coating binder globally for offset, gravure, and digital printing papers.
Technical Specifications
| pH | 7.5–9.5 |
| appearance | White milky liquid dispersion |
| solid content (%) | 50±2 |
| particle size (nm) | 100–200 |
| viscosity (mPa·s, 25°C) | 50–300 |
| glass transition temperature Tg (°C) | 5–20 |
Applications
- Primary binder in pigment coating for coated printing paper
- Board coating for packaging and folding carton
- Inkjet and digital printing base paper coating
- Gloss, matte, and silk coated paper grades
- Cast coating and high-speed blade coating operations
Key Features
- Excellent pigment binding efficiency at low binder demand
- Controllable Tg for balance of film flexibility and dry-pick resistance
- Superior gloss development with kaolin coating pigments
- Available in carboxylated grades for enhanced water resistance
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